Chilling unit



' Aug. 25, 1931. J. J. KORENCHAN CHILLING UN I T Filed June 29, 1929 6Sheets-Sheet 1 +2 jzueiz b @7272, zfffrezwizazz Aug. 25, 1931. J. J.KORENCHAN CHILLING UNIT Filed June 29, 1929 1 e Sheets-Shet 2 /V A s;

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Aug. 25, 1931. J. J. KORENCHAN CHILLING UNIT Filed June 29. 1929 6Sheets-Sheet 3 Aug. 25, 1931.

J. KORENCHAN CHILLING UNIT 6 Shets-$heet 4 Filed June 29, 1929 6Sheets-Sheet 5 CHILLING UNIT J. J. KORENCHAN Filed June 29, 1929 Aug.25, 1931'.

Patented Aug. 25, 1931 UNITED STATES PATENT OFFICE JOHN J'. KORENCHAN,OF CHICAGO, ILLINOIS GI-IILLING UNIT Application filed June 29,

simplify the construction of such units and at the same time enhance theefiiciency'thereof.

A further object of the invention is to provide a unit having chillingcoils, each. of which is provided with connections whereby vaporproducedtherein is rapidly removed.

A further object of the invention is to provide such a unit composed ofrelatively few parts and readily assembled so as to produce 1.3 a devicehaving highly eflicient heat exchange capabilities; Other objects,advantages and capabilities will later more fully appear.

My invention further resides in the combination. construction andarrangement of 20 parts illustrated in the accompanying drawings, andwhile I have shown herein certain preferred embodiments, I wish the sameto be understood as illustrative only, and not limiting the scope of myinvention.

:3 In the drawings,

Figure 1 is a front elevation of one embodiment of my invention,

Fig. 2 is a sectional View on the line 2--2 of Fig. 1, :3 Fig. 3 is afront elevation of another embodiment of my invention, Fig. 4 is asectional View on the line 4-4 of Fig. 3, Fig. 5 is a front elevation-ofa further :3 embodiment of my invention, and

Fig. 6 is a sectional view on the line 6-6 of Fig. 5.

Referring to Figs. 1 and 2 of the drawings, the apparatus comprises aboiler 10 for the refrigerant liquid which is preferably constituted bya horizontally arranged-longitudinal chamber provided with a closure 11.Said closure 11 earries'connections for the vapor pipe 12 and liquidrefrigerant pipe 13 '1 which communicate with suitable compression andcooling means (not shown). The

liquid refrigerant enters the boiler 10 through a valve 14 which iscontrolled by a valve needle 15 guided in a bracket 16 on which {'3 ispivoted an arm 17 pivotally connected to 1929 Serial No. 374,828.

the valve needle 15, and carrying a float chamber 18 which-is adapted tocontrol the valve 14 so as to maintain constant level of liquidrefrigerant within the boiler 10. A drained vapor outlet 19 is providedin the boiler 10 for the purpose of conveying vapors outwardl to thepipe 12.

Below the oiler 10 the chilling unit is provided with a radiating orheat exchange section which is constituted by spaced coils 20, which, inthe embodiment illustrated in Figs. 1 and 2, are formed from a singlelength of pipe, of which the ends connect into the boiler 10 below theliquid level therein and praferably at the bottom thereof near its on s.

As shown in Fig. 1, the coils 20 are of substantially rectangular formso as to define a chamber suitable for the freezing of water to form icecubes, or other. liquids. Longitudinal bars 21 are spot welded orotherwise attached to the coils 20, and said-bars have mounted thereontransversely rectangular frames 22 which support longitudinal slides 23which slidably support receptacles 24 adapted to contain water or otherliquids'to be frozen. The bars 21 and slides 23 extend forwardly andcarry at their forward ends a frame 25 and a hinged door 26 which isadapted to conceal the receptacles 24 from view, except duringwithdrawal and replacement. The door 26 may be provided with a handle26*.

The upper sides or portions of the coils 20 are connected by nipples orrisers 27 to a 35 longitudinal header-28. Said header is provided withan upstanding nipple 29 which is connected by a union 30 to a bent tube31 which is connected into the upper portion of the boiler 10, that isabove the liquid level in said boiler.

In the operationof the unit, the coils 20 are maintained substantiallyfull of liquid refrigerant at a low temperature. As heat passes throughthe walls of the coils, vaporization occurs and the vapors fromeach coilpass immediately upwards through the nipples 27, header 28, nipple 29and tube 31 into the vapor space in boiler 10, so that the coils 20 willbe maintained substantially full of liquid refrigerant so that a highlyefiicient heat transfer is insured.

The material from which the parts of the system exposed to therefrigerant are made depends upon the nature of said refrigerant. Thuswhere sulphur dioxide is employed, such parts are preferably made ofcopper. In such a case the connections between the coils 20 and theboiler 10 and the nipples 27, likewise the connections between thenipple 29 and union 30, and between the pipe 31 and the union 30 andboiler 10 may suitably be brazed or soldered together.

In the case of certain other refrigerant liquids, such as me hylchloride, it is possible to make the coils 20 and the boiler 10 of iron.In this case it is preferred to weld the various parts together. For thepurpose of convenience, it is preferable that the pipe 31 should be ofcopper since tubes of that metal are more readily bent into theconfiguration desired. The copper tube 31 may suitably be soldered intothe boiler 10 and union 30.

In Figs. 3 and 4 similar parts are referred to by the same referencenumerals. In this embodiment the coils 20 are of annular form, each coil20 being formed from a pair of tubes 32 of U shape, the ends of whichare soldered, brazed, welded or otherwise suitably attached to crossconnections 33 and 34. Adjacent cross connections 33 aresimilarly heldrigidly by nipples 35, and the cross connections 34 are similarly,united by nipples 36 so that the coils 20 are arranged in a spacedseries as seen in Fig. 4. The boiler 10 is provided with depending lugs37 which are welded to certain of the cross'connections 33 so as tosupport the coils from theboiler.

The cross connections 33 and nipples 35 constitute a conduit whichcommunicates with the upper pa t of each of the coils 20. Such conduitis closed at its forward end and its rear end is connected by a tube 38to the upper part of the boiler 10. The cross connections 34 and thenipples 36 define a conduit into which the lower parts of the coilsopen. This conduit is also closed at its forward end and is connected atits rear end by a pipe 39 which extends therefrom into the bottom of theboiler 10.

In the operation, liquid refrigerant flows from the boiler 10 throughthe pipe 39 into the coils 20 thereby maintaining same substantiallyfull of liquid refrigerant. Vapors produced in said coils pass therefrominto the conduit defined by the cross connections 33 and nipples 35,from which they pass by by a plurality of nipples 41 to the boiler 10below the liquid level thereof.

In operation liquid refrigerant passes from the boiler downwardlythrough one or more of the nipples 41 so that the coils 20 aremaintained flooded. Vapors which are produced in any of the coils 20pass immediately into the header 40, from which they pass upwardly intothe boiler 10 through one or more of the nipples 41.

I claim:

1. A chilling unit com )rising an elongated refrigerant boiler, a seriesof spaced interconnected coils at a lower level, means conmeeting saidcoils to a point below the liquid level of said boiler so that saidcoils are maintained substantially full of liquid refrigerant andconduit means communicating with the upper portion of each coil and withsaid boiler. 2. A chilling unit comprising an elongated refrigerantboiler, a series of spaced coils at alower level arranged to define achilling chamber, means connecting-said coils to a point below theliquid level of said boiler so that said coils aremaintainedsubstantially full of liquid refrigerant and a header connected to theupper portion of each coil and to said boiler.

3. A chilling unit comprising an elongated refrigerant boiler, a seriesof spaced interconnected coils at a lower level, means connecting saidcoils to a point below the liquid level of said boiler so that saidcoils are maintained substantially full of liquid refrigerant, andconduitmeans communicating with the upper portion of each coil and withsaid boiler above the liquid level there- 1n.

4. A chilling unit comprising an elongated refrigerant boiler, a seriesof spaced. coils at a lower level arranged to define a chilling chamber,means connecting said coils to a point below the liquid level of saidboiler so that said coils are maintained substantially full of liquidrefrigerant and a header connected to the upper portion of each coil andto said boiler above the liquid level therein.

5. A chilling unit comprising a refrigerant boiler, a series of coilsformed from a single length of tube, said tube being connected to saidboiler so as to be maintained substantially full of liquid refrigerant,and conduit means connected to each of said coils and adapted to returnvapors therefrom to the boiler.

6. A chilling unit comprising a refrigerant boiler, a series of coilsformed from a single length of tube, conduit means communicating withthe upper end of each coil and with said boiler and means adapted tosupply liquid refrigerant to said coils.

7. A chilling unit comprising an elongated refrigerant boiler, a seriesof spaced coils formed from a single length of tube at a boiler abovethe liquid level therein,

lower level, meansconnecting said coils to a point below the liquidlevel of said boiler so that said coils are. maintained substantiallyfull of liquid refrigerantand conduit means communicating with the upperportion of each coil and with said boiler. I

8. A chilling unit comprising an elongated refrigerant boiler, a seriesof spaced coils formed from a single length of tube at a lower level,means connecting said coils to a point below the liquid level'of saidboiler so that said coils are maintained substantially full of liquidrefrigerant and a header connected to the upper portion of each coil andto said boiler. I

t). A chilling unit comprising a refrigerant boiler, a series of coilsformed from a single length of tube, means adapted to supply liquidrefrigerant to said coils and a conduit connected to each of said coilsand-adapted to return vapors therefrom to the boiler above I the liquidlevel therein.

10. A chilling unit comprising a refrigerant boiler, a series of coilsformed from a single length oftube, conduit means communicating witheach coil and with said the ends of said tube being connected directlyto said boiler below the liquid level therein to maintain said coilssubstantially full of liquid refrigerant.

11. A chilling unit comprising an elongated refrigerant boiler, a seriesof spaced coils formed from a single length of tube at a lower level,means connecting said coils to the boiler below the liquid level thereinso that said coils are maintained substantially full of liquidrefrigerant, and conduit means communicating with the upper portion ofeach coil and with said boiler above the liquid level therein.

12. A chilling unit comprising an elongated refrigerant boiler, a seriesof spaced coilsformed from a single length of tubing at a lower level,means connecting said coils to said boiler below the liquid leveltherein so that said coils are maintained substantially full of liquidand a header connected to the upper portion of each coil and to saidboiler above'the liquid level therein.

13. A chilling unit comprising an elongated refrigerant boiler, a seriesof spaced interconnected coils at a lower level arranged to define achilling chamber, means connectin g said coils to a point below'theliquid level of said boiler so that said coils are maintainedsubstantially full of liquid refrigerant, and conduit meanscommunicatingwith the upper portion of each coil and with said boiler.

14. A chilling unit comprising an elongated refrigerant boiler, a seriesof spaced interconnected coils at a lower level arranged to define achilling chamber, means connecting said coils to a point below theliquid level of said boiler so that said coils are maintainedsubstantially full of liquid refrigerant, and conduit meanscommunicating with the upper portion of each coil and with said boilerabove the liquid level therein.

15. A chilling unit comprising a refrigerant boiler, a series of coilsformed from a single length of tube so as to define a chilling chamber,said tube being connected to said boiler so as to be maintainedsubstantially full of liquid refrigerant, and conduit means connected toeach of said coils and adapted to return vapors therefrom to the boiler.

16. A chilling unit comprising an elongated refrigerant boiler, a seriesof spaced coils formed from a single length of tubing so as to define achilling chamber at a level, means connecting said coils to said boilerbelow the liquid level therein so that said coils are maintainedsubstantially full of liquid and a header connected to the upper)ort-ion of each coil and to said boiler above the liquid level therein.

In testimony whereof, I have hereunto set my hand this 26th day of June,1929.

JOHN. J. KORENCHAN.

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